22.23
NUCLEAR RADIATION Radiation is really nothing more than the emission of energy waves through space, as well as through physical objects. Usually these energy waves are electromagnetic radiation which are classified into-Radio waves-Infrared waves-Visible light-Ultraviolet waves-X-ray-Gamma rays and-Cosmic rays In 1896 a French scientist, Henri Becquerel found that his photographic plates had become fogged, even though they had been protected from light. What this meant was that another source with properties of light, some rays, had penetrated the plates’ covering. He concluded that this effect came from compounds that he was working with containing uranium. Materials with such properties are called radioactive and include also thorium and...
